ES8705177A1 - Digital vertical beam landing correction circuit. - Google Patents

Digital vertical beam landing correction circuit.

Info

Publication number
ES8705177A1
ES8705177A1 ES549181A ES549181A ES8705177A1 ES 8705177 A1 ES8705177 A1 ES 8705177A1 ES 549181 A ES549181 A ES 549181A ES 549181 A ES549181 A ES 549181A ES 8705177 A1 ES8705177 A1 ES 8705177A1
Authority
ES
Spain
Prior art keywords
vertical beam
correction
location
beam landing
scan line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES549181A
Other languages
Spanish (es)
Other versions
ES549181A0 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Publication of ES549181A0 publication Critical patent/ES549181A0/en
Publication of ES8705177A1 publication Critical patent/ES8705177A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements
    • H04N3/2335—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements with calculating means

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)
  • Radiation-Therapy Devices (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)

Abstract

Vertical beam landing errors in color cathode ray tubes are corrected by a digital delay circuit (20) which provides horizontal scan line video pixel information at its proper location to produce a distortion corrected raster. Accurate correction is provided by sample interpolation techniques (31, 32, 37) that effectively form derived pixels that have an apparent location between scan-lines that corrects the scanning distortions. The location of the derived pixel relative to the video pixel samples can be determined by the selection (34, 35) of the interpolating coefficients. Such correction is preferably combined with a scan line offset technique (34, 30) providing a coarse correction.
ES549181A 1984-11-29 1985-11-22 Digital vertical beam landing correction circuit. Expired ES8705177A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/676,141 US4620136A (en) 1984-11-29 1984-11-29 Digital vertical beam landing correction circuit

Publications (2)

Publication Number Publication Date
ES549181A0 ES549181A0 (en) 1987-04-16
ES8705177A1 true ES8705177A1 (en) 1987-04-16

Family

ID=24713384

Family Applications (1)

Application Number Title Priority Date Filing Date
ES549181A Expired ES8705177A1 (en) 1984-11-29 1985-11-22 Digital vertical beam landing correction circuit.

Country Status (12)

Country Link
US (1) US4620136A (en)
EP (1) EP0184356B1 (en)
JP (1) JP2622951B2 (en)
KR (1) KR930011968B1 (en)
CN (1) CN1013236B (en)
AT (1) ATE50105T1 (en)
AU (1) AU586650B2 (en)
CA (1) CA1233556A (en)
DD (1) DD242145A5 (en)
DE (1) DE3575836D1 (en)
ES (1) ES8705177A1 (en)
HK (1) HK17295A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772847A (en) * 1985-04-17 1988-09-20 Hitachi, Ltd. Stroboscopic type potential measurement device
US4687973A (en) * 1986-07-09 1987-08-18 Electronic Image Systems, Inc. Digital waveform generator
JP2542592B2 (en) * 1986-12-17 1996-10-09 株式会社東芝 Color picture tube device
US4871948A (en) * 1988-11-08 1989-10-03 Honeywell Inc. Memory mapped deflection correction system
JP3050880B2 (en) * 1989-04-28 2000-06-12 株式会社リコー Image forming device
US4992706A (en) * 1990-02-21 1991-02-12 North American Philips Corporation CRT raster distortion correction circuit
US6437829B1 (en) 1997-01-16 2002-08-20 Display Laboratories, Inc. Alignment of cathode ray tube displays using a video graphics controller
US5969486A (en) * 1997-01-16 1999-10-19 Display Laboratories, Inc. Detecting horizontal blanking time in cathode ray tube devices
US6285397B1 (en) 1997-01-16 2001-09-04 Display Laboratories, Inc. Alignment of cathode ray tube video displays using a host computer processor
FR2851714A1 (en) * 2003-07-01 2004-08-27 Thomson Licensing Sa Video image signal processing method, involves sampling image signal to average frequency multiple of pixel frequency, and varying sample numbers for each pixel which is function of movement values of that pixel and neighbor pixel
JP4909779B2 (en) * 2006-04-17 2012-04-04 パナソニック株式会社 Image data transfer method, image processing apparatus, and imaging system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093895A (en) * 1976-05-03 1978-06-06 Gte Sylvania Incorporated Assymetric top-bottom pincushion correction circuit
GB1586201A (en) * 1977-09-15 1981-03-18 Ibm Methods of generating correction factor signals for cathode ray tubes
JPS55133183A (en) * 1979-04-03 1980-10-16 Sony Corp Correction circuit for horizontal linearity
NL8005186A (en) * 1980-09-17 1982-04-16 Koninkl Philips Electronics Nv TELEVISION CIRCUIT FOR APPLICATION IN SIGNAL RECORDING RESPECTIVE DISPLAY.
US4385259A (en) * 1980-12-24 1983-05-24 Sperry Corporation Dynamic convergence control apparatus for shadow mask CRT displays
JPS57212492A (en) * 1981-06-24 1982-12-27 Hitachi Ltd Color diviation corrector for color braun tube
US4422019A (en) * 1982-07-12 1983-12-20 Tektronix, Inc. Apparatus for providing vertical as well as horizontal smoothing of convergence correction signals in a digital convergence system
US4600945A (en) * 1983-03-31 1986-07-15 Rca Corporation Digital video processing system with raster distortion correction

Also Published As

Publication number Publication date
AU586650B2 (en) 1989-07-20
DE3575836D1 (en) 1990-03-08
CN85108588A (en) 1986-08-20
ES549181A0 (en) 1987-04-16
US4620136A (en) 1986-10-28
CA1233556A (en) 1988-03-01
KR860004551A (en) 1986-06-23
JPS61133790A (en) 1986-06-21
JP2622951B2 (en) 1997-06-25
EP0184356A3 (en) 1987-07-01
ATE50105T1 (en) 1990-02-15
EP0184356A2 (en) 1986-06-11
DD242145A5 (en) 1987-01-14
EP0184356B1 (en) 1990-01-31
HK17295A (en) 1995-02-17
KR930011968B1 (en) 1993-12-23
AU5027485A (en) 1986-06-05
CN1013236B (en) 1991-07-17

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20040916